Answer:
1. negatively charged ion
Explanation:
A fertilized egg is called a zygote until it divides into 16 cells, forming a ball-shaped structure called a morula. The events during the zygote stage involve the integration of both parents' DNA into the cell nucleus and the beginning of rapid cell division, or cleavage.
<span>Cells that are in multicellular organisms are suited to do specific jobs and work together to help the organism stay alive. Single celled organisms have to perform all the actions themselves in order to stay alive. :) </span>
Cell membranes are made of phospholipids to keep the cell's water (cytoplasm) in and everything else out. so your answer would be D <span />